My 2010 RKC came with the 407 on rear and 408 on the front. When I replaced the rear Wham! Almost 500 bucks. Now I'm getting ready to replace the front (18,000 mi and a 2 on the tread gauge) My question is can I replace the front with a 402 instead of the 408. Online dealer cost's 145 and local dealer wants 235 for the 408. The 407 & 8 can only be purchased at the dealer no online sales. Does anybody know if there is a big difference between the two tires and would it make any difference by having the 407 on the rear and 402 on the front. Does Dunlop make the 408 under a different name? The Dlr will install tires you purchase elsewhere no increase in installation cost.